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  <title>返回分配给 PHP 内存的峰值</title>
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  <div id="layout-content"><div id="function.memory-get-peak-usage" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">memory_get_peak_usage</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.2.0, PHP 7)</p><p class="refpurpose"><span class="refname">memory_get_peak_usage</span> &mdash; <span class="dc-title">返回分配给 PHP 内存的峰值</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.memory-get-peak-usage-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>memory_get_peak_usage</strong></span>
    ([ <span class="methodparam"><span class="type">bool</span> <code class="parameter">$real_usage</code><span class="initializer"> = false</span></span>
  ] ) : <span class="type">int</span></div>

  <p class="para rdfs-comment">
   返回分配给你的 PHP 脚本的内存峰值字节数。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.memory-get-peak-usage-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">real_usage</code></dt>

     <dd>

      <p class="para">
       如果设置为 <strong><code>TRUE</code></strong> 可以获取从系统分配到的真实内存尺寸。
       如果未设置，或者设置为 <strong><code>FALSE</code></strong>，仅会报告 <em>emalloc()</em> 使用的内存。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.memory-get-peak-usage-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回内存峰值的字节数。
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.memory-get-peak-usage-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>5.2.1</td>
       <td>
        使用此函数无需在编译时加上 <a href="ini.core.html#ini.memory-limit" class="link">--enable-memory-limit</a>  选项。
       </td>
      </tr>

      <tr>
       <td>5.2.0</td>
       <td>
        添加参数 <code class="parameter">real_usage</code>。
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.memory-get-peak-usage-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="memory_get_usage.html" class="function" rel="rdfs-seeAlso">memory_get_usage()</a> - 返回分配给 PHP 的内存量</span></li>
    <li class="member"><a href="ini.core.html#ini.memory-limit" class="link">memory_limit</a></li>
   </ul>
  </p>
 </div>


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